1. University of Copenhagen; Faculty of Health and Medical Sciences; Blegdamsvej 3B Copenhagen N Denmark 2200
2. Faculty of Health and Medical Sciences; Copenhagen Medical University; Blegdamsvej 3 Copenhagen Denmark 2100Ø
3. Hvidovre Hospital, University of Copenhagen; Department of Endocrinology; Hvidovre Denmark
4. Department 7652, Rigshospitalet; Department of Endocrinology, Diabetes and Metabolism; Blegdamsvej 9 Copenhagen Denmark DK-2100
5. Institute of General Practice, Medical Faculty of the Heinrich-Heine-University Düsseldorf; Cochrane Metabolic and Endocrine Disorders Group; Moorenstr. 5 Düsseldorf Germany 40225